Question: AP Supplier Invoice Interface to Project Accounting Rejections

Unisys Corporation recently upgraded to R12.1 and has item failures on the Interface of Supplier Invoices from AP to PA. The Project Controller’s Office (PCO) has suggested, in some instances, that the SYS ADMIN TEAM remove the Project reference and DELETE the record from the PA Interface Table… That approach does not appear it will work…  It seems our only recourse is to somehow go back to the original invoice distribution lines in AP and “update the INVOICE [which has already been paid & booked to the General Ledger]  NUMBER that has the Project reference” and reverse and rebook it without the PROJECT NUMBER on the ‘updated’ invoice.